Safety Warning
- CVT transmission problems can cause sudden loss of power or unexpected acceleration
- Avoid aggressive driving until diagnosis is complete
- Be prepared for potential transmission failure - keep vehicle in safe areas when testing
- Do not attempt CVT internal repairs without proper training and tools
Quick Diagnosis Summary
Understanding P0746 Code in Your 2013 Nissan Altima
If your 2013 Nissan Altima is experiencing jerking during deceleration and you've encountered the P0746 diagnostic trouble code, you're dealing with a common but serious CVT transmission issue. The P0746 code specifically indicates "Pressure Control Solenoid A Performance or Stuck Off," which means your CVT transmission's pressure control system isn't functioning properly.
This issue is particularly prevalent in 2013 Nissan Altimas when the transmission is warm, and while it represents a medium-severity problem, it requires prompt attention to prevent more costly damage. Understanding the symptoms, causes, and repair options will help you make informed decisions about addressing this transmission concern.
Recognizing P0746 CVT Jerking Symptoms
When your 2013 Nissan Altima develops P0746 code issues, you'll typically notice several distinct symptoms that become more pronounced when the transmission is warm:
- Jerking during deceleration: The most common symptom, occurring as the CVT attempts to adjust ratios during speed reduction
- Rough shifting behavior: The transmission may feel hesitant or erratic when changing between drive ratios
- Delayed engagement: You might experience a delay when shifting from park to drive or reverse
- RPM fluctuation: Engine RPMs may surge or drop unexpectedly during normal driving
- Check engine light: The P0746 code will trigger the check engine light on your dashboard
- Transmission slipping: You may feel the transmission slip or lose power during acceleration
- Whining or grinding noises: Unusual sounds from the transmission area, especially when warm
These symptoms typically worsen as the transmission warms up during normal driving, making the problem more noticeable during longer trips or stop-and-go traffic.
Common Causes of P0746 Code in 2013 Nissan Altima
CVT Transmission Fluid Degradation (High Probability)
The 2013 Nissan Altima is known for CVT transmission issues, particularly related to fluid degradation. When CVT fluid breaks down, it loses its ability to properly lubricate and operate the complex valve systems within the transmission. This degraded fluid cannot maintain proper pressure, leading to the P0746 code and jerking symptoms, especially during deceleration when the transmission is adjusting ratios.
CVT Control Valve Body Malfunction (High Probability)
The CVT control valve body is responsible for regulating fluid pressure and flow throughout the transmission. When this component malfunctions, it can cause erratic pressure control, triggering the P0746 code. This is a particularly common failure point in Nissan CVT transmissions, and the problem becomes more apparent when the transmission is warm and the valve body expands or contracts.
CVT Belt or Chain Wear (Medium Probability)
The CVT system relies on a belt or chain to transfer power between pulleys. Over time, this component can wear or stretch, causing slippage and improper ratio changes. This wear often manifests as jerking during deceleration and can contribute to pressure control issues that trigger the P0746 code.
Throttle Position Sensor Malfunction (Medium Probability)
A faulty throttle position sensor can send incorrect signals to the transmission control module, causing improper shift timing and pressure control. When the sensor provides inaccurate data, the transmission may not respond appropriately to driver inputs, leading to jerking and the P0746 code.
Mass Airflow Sensor Contamination (Low Probability)
While less common, a dirty or failing mass airflow sensor can affect engine performance in ways that impact transmission operation. Incorrect air-fuel mixture calculations can cause engine hesitation that may be perceived as transmission jerking, potentially contributing to pressure control issues.
Diagnosing P0746 Code Issues
Proper diagnosis of P0746 code issues requires systematic testing to identify the specific cause:
Initial Code Reading
Use an OBD-II scanner to confirm the P0746 code and check for additional related codes. Note any pending codes that might provide additional diagnostic information.
CVT Fluid Inspection
Check the CVT fluid level, color, and consistency. Healthy CVT fluid should be relatively clear and not have a burnt odor. Dark, thick, or burnt-smelling fluid indicates degradation.
Transmission Temperature Testing
Monitor transmission temperature during operation to determine if symptoms correlate with temperature changes. Most CVT issues in the 2013 Altima become more pronounced when warm.
Pressure Testing
Professional diagnosis may require pressure testing of the CVT system to verify proper pressure control solenoid operation and identify valve body issues.
Repair Options for P0746 Code
Professional Repair Approach
Given the complexity of CVT transmissions, professional repair is strongly recommended for P0746 code issues. A qualified technician can:
- Perform comprehensive diagnostic testing
- Replace the pressure control solenoid if faulty
- Service or replace the valve body assembly
- Perform complete CVT fluid flush and replacement
- Update transmission control module software if applicable
DIY Limitations
DIY repair of P0746 code issues is classified as difficult due to:
- Complex CVT internal components requiring specialized tools
- Need for proper CVT fluid specifications and procedures
- Risk of causing additional damage without proper training
- Requirement for pressure testing equipment
- Potential need for transmission programming after repairs
The most feasible DIY approach is CVT fluid replacement, but this should only be attempted if you have experience with transmission service.
Repair Cost Breakdown
The estimated cost range for addressing P0746 code issues in a 2013 Nissan Altima is $150-$300, depending on the specific cause:
Lower Cost Range ($150-$200)
- CVT fluid flush and replacement
- Throttle position sensor replacement
- Mass airflow sensor cleaning or replacement
Higher Cost Range ($200-$300)
- Pressure control solenoid replacement
- Minor valve body repairs or cleaning
- Diagnostic time for complex issues
Important Note: These costs represent repairs that address the P0746 code without requiring major transmission overhaul. If the CVT has suffered extensive damage, costs could significantly exceed this range.
Prevention Tips for CVT Transmission Health
To prevent P0746 code issues and extend your 2013 Nissan Altima's CVT transmission life:
- Follow fluid change intervals: Replace CVT fluid every 30,000-60,000 miles or as recommended
- Use only specified fluid: Always use Nissan NS-2 or NS-3 CVT fluid - never substitute
- Avoid aggressive driving: Minimize hard acceleration and sudden stops that stress the CVT
- Allow warm-up time: Let the transmission warm up before demanding full performance
- Address codes promptly: Don't ignore check engine lights or transmission symptoms
- Regular maintenance: Keep up with overall vehicle maintenance to support transmission health
- Monitor fluid levels: Check CVT fluid periodically for proper level and condition
Safety Warnings and Precautions
P0746 code issues in your 2013 Nissan Altima require careful attention to safety:
- Sudden power loss risk: CVT transmission problems can cause unexpected loss of power or acceleration
- Avoid aggressive driving: Limit high-speed driving and rapid acceleration until diagnosis is complete
- Stay in safe areas: When testing or experiencing symptoms, ensure you're in areas where you can safely pull over
- Don't attempt internal repairs: CVT internal components require specialized training and tools
- Seek prompt diagnosis: Early intervention can prevent more costly transmission damage
Frequently Asked Questions
P0746 code indicates "Pressure Control Solenoid A Performance or Stuck Off" in your CVT transmission. This means the transmission's pressure control system isn't functioning properly, often causing jerking during deceleration and other shifting issues, especially when the transmission is warm.
While you can drive short distances, it's not recommended for extended periods. P0746 code indicates transmission pressure control issues that can lead to sudden power loss or further damage. Avoid aggressive driving and seek diagnosis promptly to prevent more costly repairs.
Repair costs typically range from $150-$300, depending on the specific cause. Simple fixes like CVT fluid replacement may cost around $150-$200, while pressure control solenoid replacement or valve body issues may reach $200-$300. Costs can be higher if extensive transmission damage has occurred.
Yes, P0746 code and CVT transmission issues are relatively common in 2013 Nissan Altimas. The CVT transmission in this model year is known for problems related to fluid degradation, valve body malfunctions, and pressure control issues, particularly when the transmission is warm.
DIY repair is classified as difficult for P0746 code issues. While you might be able to replace CVT fluid, most repairs require specialized tools, proper diagnostic equipment, and transmission expertise. Attempting complex CVT repairs without proper training can cause additional damage.
Ignoring P0746 code can lead to complete CVT transmission failure, which would require expensive replacement or rebuilding costing thousands of dollars. Early intervention with proper diagnosis and repair can prevent minor issues from becoming major transmission problems.